If using more than one update site to install UML2 Tools and its dependencies (EMF, UML2, OCL, Model Query, Model Transaction, Validation Framework, GEF, GMF), be sure to expand each one before clicking 'Select Required' to ensure Update Manager can find the features it needs.

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In Update manager I get the error message "gef (3.1.0) is needed"

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If you use the Europa Discovery / Update Site, all the required projects are available in a single site.

If using more than one update site to install UML2 Tools and its dependencies (EMF, UML2, OCL, Model Query, Model Transaction, Validation Framework, GEF, GMF), be sure to expand each one before clicking 'Select Required' to ensure Update Manager can find the features it needs.

If you use the Europa Discovery / Update Site, all the required projects are available in a single site.